loose-jointed

形容词 loose-jointed:

1. loosely articulated or constructed

loose-joint.ed

adj.（形容词）
Having freely articulated, highly mobile joints.
有自由连接，活动自如的关节的
Limber or agile in movement.
行动灵便的：在运动中轻柔或灵活的

【引伸】
loose.-joint.edness
n.（名词）